What volume of oxygen at 455 K and a pressure of 127400 Pa is produced by the decomposition of 114.7 g of BaO2 to BaO and O2?

Answers

Answer 1

Answer:

10 L

Explanation:

The equation of the reaction is;

2BaO2 = 2BaO + O2

Number of moles of  BaO2 = 114.7 g/169.33 g/mol = 0.677 moles

From the reaction equation;

2 moles of BaO2 yields 1 moles of O2

0.677 moles of BaO2 yields 0.677 * 1/2 = 0.3385 moles of oxygen

Hence;

PV=nRT

V = ?

P = 127400 Pa or 1.257 atm

T = 455 K

n = 0.3385 moles

R = 0.082 atmLmol-1K-1

V = nRT/P

V = 0.3385 * 0.082 * 455/1.257

V= 10 L


Related Questions

electrons are transferred in forms of what

Answers

Answer:

ionic bonds

Explanation:

an ionic bond !!!!!!

Which statement is about weather and not climate?
A. The high temperature yesterday in Dallas was 24°C.
B. Dallas has hot summers and generally mild winters.
C. The coolest month of the year in Dallas is usually January.
D. In Dallas, it often reaches 40°C in the summer.

Answers

the answer is A. because climate is an average of weather calculated over 30 years or more while weather is more the current forecast

Answer:

B

Explanation:

I hope that's right I think it is though

Which of the following setups will correctly convert 36.45 grams of sodium to moles of sodium?

Answers

Answer:

D.

Explanation:

To convert from grams of a substance to moles of a substance, you use molar mass as a conversion factor. Sodium's molar mass is 22.99 grams per mole. To cancel out grams, you need to place grams on the bottom and moles on the top.

50g of potassium chloride is dissolved in 500 cm3 of water. Calculate the concentration of the solution. Give your answer in g/dm3

Answers

50g of potassium chloride

It is more logical to believe that the complex life sustaining processes of the sun-Earth system were created because they Choose... on one another.

A. rely
B. orbit
C. breathe
D. spin

Answers

They (A. Rely) on eachother.

Generally, when food is cooked:
choose all that apply

The food absorbs energy.

An exothermic reaction takes place in the food.

An endothermic reaction takes place in the food.

Answers

Answer:

An exothermic reaction takes place in the food

Sodium bicarbonate (NaHCO3), also known as baking soda, is used to relieve heartburn, sour stomach, or acid indigestion by neutralizing excess stomach acid. When used for this purpose, it is said to belong to the group of medicines called antacids.



How many atoms are found in two molecules of sodium bicarbonate?

Answers

Answer:

NaHCO3 = No. of atoms in one molecule is 1 sodium + 1 Hydrogen + 1 carbon + 3 oxygens = 6 atoms per molecule.

We double it for two molecules, so 12 Molecules!

Explanation:

Hope i helped, Brainliest would be appreciated!

Have a nice day!

  -Aadi x

When converting from grams to the must be used as a conversion factor

Answers

moles=grams/molar mass

give an example of how an organism can use surface tension?

Answers

Answer: Examples of surface tension

Explanation:

Water striders use the high surface tension of water and long, hydrophobic legs to help them stay above water. Water striders use this surface tension to their advantage through their highly adapted legs and distributed weight.

True or false: chewing your food is the first step of digestion. o True O False​

Answers

Answer:

True

Explanation:

I searched it up lol

A wagon is pushed in a straight line. How would an increase in friction on the wagon wheels affect the wagon ?

Answers

Answer:

A  wagon is pushed in a straight line. How would an increase in friction on the wagon wheels affect the wagon? A It would cause the wagon to move faster.

Explanation:

Hoped this helped you guys!

pls help, what is this compound called?

Answers

Answer:

Ammonium

Explanation:

ammonium is a compound because it has 2 elements

compound is a material formed by chemically bonding two or more chemical elements.

If the sun output of solar radiation increased by 20% how would this impact the temperature of earth's mantle

Answers

Answer:

The temperature will not be affected directly

Explanation:

The solar radiation has a direct effect on the outer surface and inner part of the earth but  an increase by 20% of the solar radiation will not cause the temperature of the Earth's mantle to increase because the factors that heat up the Earth's mantle are : Friction between core materials that sink into the center of the planet and Heat from decay of radioactive materials

What number is pointing to the area where magma is less dense due to
heat?

Answers

Answer:

I think it's 2

Explanation:

The magma gets so hot, it floats up before cooling and sinking again

There are three factors in which natural selection occurs. Select one statement from the list below that is a true statement about natural selection.

Answers

Answer: There is no list in your question. But the three factors in which natural selection occurs are:

1. A struggle for existence,

2. Variation and

3. Inheritance

Explanation:

Darwin’s theory of natural selection is the way in which organisms change overtime.

These changes allow organisms to become better adapted to their environment and increase their chances for survival.

The three major factors through which natural selection occurs are:

1. A struggle for existence,

2. Variation and

3. Inheritance

Darwin’s theory of natural selection will occur if the three conditions above are met and unless these factors are in place, natural selection will not occur.

Mm 2mCOO 19. Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x (3 points) 10-11 mol/L. Is this solution acididc, basic, or neutral? Show your work.

Answers

Answer: The hydrogen-ion concentration for the aqueous solution is [tex]10^{-3}mol/L[/tex] and solution is acidic.

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxyl ion concentration.  

[tex]pOH=-\log [OH^-][/tex]  

Putting in the values:

[tex]pOH=-\log[1\times 10^{-11}][/tex]

[tex]pOH=11[/tex]

[tex]pH+pOH=14[/tex]

\[tex]pH=14-11=3[/tex]

[tex]pH=-log[H^+][/tex]

[tex]3=-log[H^+][/tex]

[tex][H^+]=10^{-3}M[/tex]

As pH is less than 7, the solution is acidic.

how many valence electrons does C6H14O6 have?

Answers

chhfjhfhou huohfpgvvocoj ognf

during the ___________ (anaphase, metaphase) step of mitosis, the centromere of each pair of chromatids becomes attached to two spindle fibers

Answers

metaphase

In metaphase, the chromosomes line up on the metaphase plate and have a spindle fiber attached to each chromatid. In anaphase, the chromatids separate.
Hi, the answer is metaphase.

Eye Color
Genetic
O Environmental
O Both

Answers

Answer:

the first cause eye color is genetic

Just help please

And does anybody know Johnny from NCT

Answers

Yes the name of it is

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!! THIS IS DUE IN 10 MINUTES!!!!!
Forensic chemists are analyzing blood samples taken from a murder victim. They run tests for any trace of substances that do not naturally occur in the bloodstream. Nothing odd registers but they do find extremely high levels of caffeine. What does this most likely indicate about the murder victim?

A) They drank a lot of coffee.
B) They worked on a coffee bean plantation.
C) They were poisoned with powdered caffeine.
D) Someone put arsenic in their coffee.

Answers

Answer:

c

Explanation:

Answer:they were poisoned with powdered caffeine (C)

Explanation:

I just took the test! And got all the points for this question :) hoped I could help

How can we prepare a weak acid from
carbondioxide ? Write with chemical equation
SAP​

Answers

Answer:

H2O+CO2--------> H2CO3

Answer:

Carbonic acid- H2CO3

Explanation:

Water+co2 gives H2CO3

H2CO3 is an acid, which Carbonic acid that is H2CO3 is a weak acid

It decomposes into CO2 and H2O

which of the following represents the atoms of 2 different elements?

Answers

Answer:

B

Explanation:

2) Why do some earthquakes cause more damage than others?

Answers

Answer:

Earthquakes are more intense the faster the planet's crust slams together, which explains why the shaking causes so much damage in some of the most populated areas around mountain chains. ... One reason for this connection is that when two plates come together quickly, the area over which an earthquake occurs is larger.Explanation:

bromine water can be used to distinguish between these two molecules?? true or false​

Answers

Answer:i dkd

Explanation:

jsach

I need help ASAP please
Calculating pH
See chart below

Answers

Answer:

12, basic, 9, basic

Explanation:

pH = -log[H+]

Using the data in the table, you can calculate the pH:

-log[1e-12] = 12

-log[1e-9] = 9

To find out whether it is acidic, basic, or neutral, use a pH scale. Anything less than 7 is acidic, anything over is basic. Knowing this, both will be basic.

1 pts
Which of the following gases would you predict to be least ideal?
Cu

Answers

Explanation:

The gas that would behave least ideally is CO

How many grams of AgCl are produced from 10.0 g AgNO3?

Answers

Answer:

Equation of Reaction = AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)

Steps:

1. Find the moles of AgNO3 with formula n= Mass/Mr (molecular mass)

so you will get moles= 10.0/ 169.87 = 0.05886854654

2. Using stoichiometry you know the equation has 1 mole so the moles of AgCl are gonna be the same; therefore, you will use again the same formula.

3.  moles= mass/molecular mass

0.05886854654 = x/ 143.32

You rearrange the formula to find the mass

so mass = moles x molecular mass

mass = 0.05886854654 x 143.32

mass= 8.44 grams

Explanation:

Which of the following is most likely a chemical reaction?

Group of answer choices

Two solid powders are combined and shaken. The substances form a mixture.

A solid is stirred into a liquid solution. The temperature of the solution decreases.

Three liquids are poured into a beaker and swirled. One of the liquids settles at the bottom.

A liquid is heated until it reaches its boiling point. Vapor is created.

Answers

Answer:

Two solid powders are combined and shaken. The substances form a mixture.

A water solution containing an unknown quantity of a

nonelectrolyte solute is found to have a freezing point of

–0.23°C. What is the molal concentration of the solution?​

Answers

Answer:

The molal concentration of the solution is approximately 0.124 molal

Explanation:

The given parameters are;

The reduced freezing point of the water = -0.23°C

For freezing point depression of a solution, we have;

[tex]\Delta T_f[/tex] = [tex]K_f[/tex]· b·i

Where;

[tex]\Delta T_f[/tex] = The freezing point depression

[tex]K_f[/tex] = Cyroscopic constant (The freezing-point depression constant) = 1.86° Cm⁻¹ for water

b = The molality of the solution

i = van't Hoff factor = 1

Therefore;

[tex]\Delta T_f[/tex] = [tex]T^{\circ}_f - T_f[/tex]

Where;

[tex]T^{\circ}_f[/tex] = The freezing point of pure water = 0°C

[tex]T_f[/tex] = The freezing point of the solution = -0.23°C

∴ [tex]\Delta T_f[/tex] = [tex]T^{\circ}_f - T_f[/tex] = 0°C - (-0.23°C) = 0.23 °C

From, [tex]\Delta T_f[/tex] = [tex]K_f[/tex]· b·i, we have;

0.23°C = 1.86°C/m × b × 1

∴ b  = (0.23°C/1.86°C/m) ≈ 0.124 molal

Therefore, the molal concentration of the solution, b ≈ 0.124 molal.

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